A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Axial compression behavior of laced cold-formed steel built-up columns with unstiffened angle sections
Abstract There are numerous parameters that influence the behavior of built-up steel columns. This paper reports an experimental investigation carried out on cold-formed steel (CFS) built-up columns composed of four unstiffened CFS equal angle sections connected by lacings intermittently along their heights. The man parameters varied in the test specimens were the width of end plate, the lacing slenderness ratio, the chord flat width-to-thickness ratio and the lacing configurations. Six pin-ended test specimens were tested under monotonically increasing concentric axial loading. The test result output viz. ultimate column strengths, load vs. displacement response, mode of failure, and deformed shapes were used to investigate the effect of above-mentioned parameters on the axial behavior of CFS built-up laced columns. The current standards for CFS structures were used to predict the column strengths for the sake of comparison. Furthermore, a numerical validation of the test results was carried out using a finite element software ABAQUS. Test results indicate that the lacing slenderness, the lacing configuration, and the end plate width affect the column behavior in CFS laced built-up columns significantly.
Highlights Monotonic tests are conducted on CFS laced built-up columns using unstiffened angles. The lacing slenderness ratio should be <80 in CFS built-up members. The chord slenderness ratio should be <70% of the overall slenderness ratio. The width of end plate should not be less than the column width.
Axial compression behavior of laced cold-formed steel built-up columns with unstiffened angle sections
Abstract There are numerous parameters that influence the behavior of built-up steel columns. This paper reports an experimental investigation carried out on cold-formed steel (CFS) built-up columns composed of four unstiffened CFS equal angle sections connected by lacings intermittently along their heights. The man parameters varied in the test specimens were the width of end plate, the lacing slenderness ratio, the chord flat width-to-thickness ratio and the lacing configurations. Six pin-ended test specimens were tested under monotonically increasing concentric axial loading. The test result output viz. ultimate column strengths, load vs. displacement response, mode of failure, and deformed shapes were used to investigate the effect of above-mentioned parameters on the axial behavior of CFS built-up laced columns. The current standards for CFS structures were used to predict the column strengths for the sake of comparison. Furthermore, a numerical validation of the test results was carried out using a finite element software ABAQUS. Test results indicate that the lacing slenderness, the lacing configuration, and the end plate width affect the column behavior in CFS laced built-up columns significantly.
Highlights Monotonic tests are conducted on CFS laced built-up columns using unstiffened angles. The lacing slenderness ratio should be <80 in CFS built-up members. The chord slenderness ratio should be <70% of the overall slenderness ratio. The width of end plate should not be less than the column width.
Axial compression behavior of laced cold-formed steel built-up columns with unstiffened angle sections
Dar, M. Adil (author) / Sahoo, Dipti Ranjan (author) / Jain, Arvind K. (author)
2019-08-06
Article (Journal)
Electronic Resource
English
Performance of stiffened and unstiffened cold-formed channel members in axial compression
| Online Contents | 2001